Antimony ion doped potassium chloride luminescent material and preparation method and application thereof

Abstract

The invention discloses an antimony ion doped potassium chloride luminescent material as well as a preparation method and application thereof. The general chemical formula of the luminescent material is K (1-x) Cl: xSb < 3 + >, and x is 0.005-0.4. The antimony ion-doped potassium chloride luminescent material provided by the invention only has the luminescent intensity of 4.3% at room temperature after being heated to 373K and excited by a 366nm light source, and the relative sensitivity obtained at 293K by the formula # imgabs0 # (SR: relative sensitivity, omega: luminescence integral intensity, and T: temperature) reaches 3.2% K <-1 >. Therefore, the antimony ion activated potassium chloride luminescent material provided by the invention can measure the temperature according to the change of the emission spectrum integral intensity along with the temperature, and can be applied to the field of environment temperature measurement.

Description

Technical Field

[0001] The invention relates to the technical field of luminescent materials, and in particular to an antimony ion-doped potassium chloride luminescent material and a preparation method and application thereof. Background Art

[0002] Luminescence thermometry (LT) is a remote sensing technology that relies on the temperature dependence of the luminescence characteristics of luminescent materials to measure temperature. The unique features of LT, such as non-contact operation, high sensitivity and miniaturization, are of great value in various fields. In addition, the high sensitivity of LT technology makes it applicable in health monitoring devices. When combined with wearable technology, LT instruments can continuously monitor body temperature and provide key data for early disease diagnosis and health management.

[0003] At present, the research on luminescent materials corresponding to LT technology mainly focuses on exploring its performance under higher and lower temperature conditions, including in the high temperature range (298-673K), such as SrLaLiTeO6:Mn6 + ,Eu 3+ (J.SCI-ADV MATER DEV8.2(2023):100544.) and low temperature region (80-300K), such as Cs2NaHoCl6:Sb 3+ (ANGEW CHEM INT EDIT 135.45(2023):e202311699.). In comparison, LT materials that are sensitive to ambient temperature (273-323K) have been less studied. In fact, accurate measurement in the ambient temperature range is of great significance to industry, medicine, scientific research, etc., such as precise temperature control of chips and medical equipment, monitoring of biological cell temperature, and measurement of indoor temperature. At present, the development and application of LT materials with high sensitivity in the ambient temperature range are still relatively insufficient, which hinders the application of LT temperature measurement devices at ambient temperature. Summary of the invention

[0004] The main purpose of the present invention is to provide an antimony ion-doped potassium chloride luminescent material applicable to the field of ambient temperature measurement, and a preparation method and application thereof.

[0005] To achieve the above object, the present invention provides an antimony ion-doped potassium chloride luminescent material, the chemical formula of which is K (1-x) Cl:xSb 3+ , where x=0.005~0.4.

[0006] The present invention also provides application of the antimony ion-doped potassium chloride luminescent material in preparing an optical ambient thermometer.

[0007] Furthermore, the reference of the application is: when the luminescent material is excited by ultraviolet light of 366nm, the integral intensity Ω of the emission spectrum and the temperature T are functions of Ω=68.21-0.58T+0.001T 2 -1.5e -6 T 3 change.

[0008] The present invention also provides a method for preparing the antimony ion-doped potassium chloride luminescent material, comprising the following steps: mixing a potassium-containing compound, a chlorine-containing compound and an antimony-containing compound, and then synthesizing the antimony ion-doped potassium chloride luminescent material by a hydrothermal method.

[0009] Furthermore, the potassium-containing compound is any one of potassium chloride, oxide, peroxide, superoxide, hydroxide, nitrate, carbonate, sulfate and the like, or a mixture of two or more of them in any proportion.

[0010] Furthermore, the chlorine-containing compound is any one of various chlorates, hypochlorites and chlorides of chlorine or a mixture of two or more of them in any proportion.

[0011] Furthermore, the antimony-containing compound is any one of antimony oxides, sulfides, halides, hydrides and the like, or a mixture of two or more of them in any proportion.

[0012] Furthermore, the preparation process is specifically as follows: according to the chemical formula K (1-x) Cl:x Sb 3+ The raw materials of potassium-containing compound, chlorine-containing compound and antimony-containing compound are weighed and placed in a polytetrafluoroethylene-lined reactor, HCl solution is added to dissolve the raw materials, and then heated at 150-200° C. for 10-14 hours, and then cooled to room temperature. The obtained crystals are washed with anhydrous ethanol and then dried at 60° C. for 5-10 hours to obtain the antimony ion-doped potassium chloride luminescent material.

[0013] The beneficial effects of the present invention are embodied in:

[0014] 1. The antimony ion-doped potassium chloride luminescent material provided by the present invention uses a compound with a composition close to KCl as a matrix, Sb 3+ To activate ions; after being excited by ultraviolet light, the material can emit in the wavelength range of 500-700nm, with the highest emission peak located near 590nm;

[0015] 2. The antimony ion-doped potassium chloride luminescent material provided by the present invention has a luminescence intensity of only 4.3% of that at room temperature after being excited by a 366nm light source when the temperature is raised to 373K, and according to the formula (S R: relative sensitivity, Ω: luminous integrated intensity, T: temperature) The relative sensitivity obtained at 293K reaches 3.2%K -1 Therefore, the potassium chloride luminescent material activated by antimony ions provided by the present invention can measure temperature according to the change of the integral intensity of the emission spectrum with temperature, and can be applied to the field of ambient temperature measurement;

[0016] 3. The antimony ion-doped potassium chloride luminescent material provided by the present invention uses antimony ions instead of rare earth ions as activation ions. Compared with rare earth ions, antimony ions are widely available, which can reduce production costs;

[0017] 4. The preparation method of the antimony ion-doped potassium chloride luminescent material provided by the present invention is a hydrothermal method, which has a relatively simple process and mainly adopts medium and low temperature liquid phase control. It does not require complex equipment and high energy consumption. Moreover, as a wet chemical method, the hydrothermal method is more environmentally friendly than other methods and is conducive to sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 XRD (X-ray diffraction) patterns corresponding to the antimony ion-doped potassium chloride luminescent materials prepared in Examples 1 to 9 of the present invention and Comparative Example 1 and the standard card of KCl.

[0019] Figure 2 The excitation spectra of the antimony ion-doped potassium chloride luminescent materials prepared in Examples 1 to 9 of the present invention and Comparative Example 1 at room temperature are shown in FIG. 5 , and the monitoring wavelength is 590 nm.

[0020] Figure 3 The emission spectra of the antimony ion-doped potassium chloride luminescent materials prepared in Examples 1 to 9 of the present invention and Comparative Example 1 at room temperature have an excitation wavelength of 366 nm.

[0021] Figure 4 This is an excitation spectrum diagram of the antimony ion-doped potassium chloride luminescent material prepared in Example 7 of the present invention in the temperature range of 273 to 373K.

[0022] Figure 5 This is an emission spectrum diagram of the antimony ion-doped potassium chloride luminescent material prepared in Example 7 of the present invention in the temperature range of 273 to 373K.

[0023] Figure 6 This is a graph showing the variation of the integrated intensity of the emission spectrum of the antimony ion-doped potassium chloride luminescent material prepared in Example 7 of the present invention with temperature and a fitting function relationship graph, where the points are experimental measurement values ​​and the curves are fitting function values.

[0024] Figure 7 This is a temperature measurement sensitivity curve of the antimony ion-doped potassium chloride luminescent material prepared in Example 7 of the present invention. DETAILED DESCRIPTION

[0025] In order to make the technical scheme of the present invention more clearly understood by those skilled in the art, the following embodiments are listed for illustration. It should be pointed out that the following embodiments do not limit the protection scope of the present invention.

[0026] Unless otherwise specified, the raw materials, reagents or devices used in the following examples can be obtained from conventional commercial sources or by existing known methods.

[0027] Example 1

[0028] Preparation of Antimony Ion Doped Potassium Chloride Luminescent Material

[0029] The chemical formula of the antimony ion-doped potassium chloride luminescent material prepared in this embodiment is: K 0.995 Cl:0.005Sb 3+ , the preparation method is as follows:

[0030] The raw materials potassium chloride and antimony oxide were weighed in a molar ratio of 0.995:0.005, and put into a polytetrafluoroethylene-lined reactor, and HCl solution (concentration of 37wt%, the amount used is until the raw materials are completely dissolved, the same below) was added to dissolve the raw materials, and then heated at 180°C for 12 hours, and then cooled to room temperature. The obtained crystals were washed with anhydrous ethanol and then dried at 60°C for 8 hours to obtain K 0.995 Cl:0.005Sb 3+ Luminous materials.

[0031] The luminescent material K prepared in this embodiment 0.995 Cl:0.005Sb 3+ The XRD pattern of Figure 1 , emission spectrum see Figure 3 .

[0032] Depend on Figure 1 It can be seen that the X-ray diffraction peak of the luminescent material of this embodiment is consistent with that of the standard card, and no other impurities are observed.

[0033] Depend on Figure 3 It can be seen that the emission peak of the luminescent material of this embodiment is located near 590 nm, and the luminescent intensity at the highest peak of the emission peak is about 383 counts.

[0034] Example 2

[0035] Preparation of Antimony Ion Doped Potassium Chloride Luminescent Material

[0036] The chemical formula of the antimony ion-doped potassium chloride luminescent material prepared in this embodiment is: K 0.99 Cl:0.01Sb 3+ , the preparation method is as follows:

[0037] The raw materials potassium chloride and antimony oxide were weighed in a molar ratio of 0.99:0.01, put into a polytetrafluoroethylene-lined reactor, and HCl solution was added to dissolve the raw materials. Then, the raw materials were heated at 180°C for 12 hours and cooled to room temperature. The obtained crystals were washed with anhydrous ethanol and then dried at 60°C for 8 hours to obtain K 0.99 Cl:0.01Sb 3+ Luminous materials.

[0038] The luminescent material K prepared in this embodiment 0.99 Cl:0.01Sb 3+ The XRD pattern of Figure 1 , emission spectrum see Figure 3 .

[0039] Depend on Figure 1 It can be seen that the X-ray diffraction peak of the luminescent material of this embodiment is consistent with that of the standard card, and no other impurities are observed.

[0040] Depend on Figure 3 It can be seen that the emission peak of the luminescent material of this embodiment is located near 590 nm, and the luminescent intensity at the highest peak of the emission peak is about 726 counts.

[0041] Example 3

[0042] Preparation of Antimony Ion Doped Potassium Chloride Luminescent Material

[0043] The chemical formula of the antimony ion-doped potassium chloride luminescent material prepared in this embodiment is: K 0.97 Cl:0.03Sb 3+ , the preparation method is as follows:

[0044] The raw materials potassium chloride and antimony oxide were weighed in a molar ratio of 0.97:0.03, put into a polytetrafluoroethylene-lined reactor, and HCl solution was added to dissolve the raw materials. Then, the raw materials were heated at 180°C for 12 hours and cooled to room temperature. The obtained crystals were washed with anhydrous ethanol and then dried at 60°C for 8 hours to obtain K 0.97 Cl:0.03Sb 3+ Luminous materials.

[0045] The luminescent material K in this embodiment 0.97 Cl:0.03Sb 3+ The XRD pattern of Figure 1 , emission spectrum see Figure 3 .

[0046] Depend on Figure 1 It can be seen that the X-ray diffraction peak of the luminescent material of this embodiment is consistent with that of the standard card, and no other impurities are observed.

[0047] Depend on Figure 3It can be seen that the emission peak of the luminescent material of this embodiment is located near 590 nm, and the luminescent intensity at the highest peak of the emission peak is about 1352 counts.

[0048] Example 4

[0049] Preparation of Antimony Ion Doped Potassium Chloride Luminescent Material

[0050] The chemical formula of the antimony ion-doped potassium chloride luminescent material prepared in this embodiment is: K 0.95 Cl:0.05Sb 3+ , the preparation method is as follows:

[0051] The raw materials potassium chloride and antimony oxide were weighed in a molar ratio of 0.95:0.05, put into a polytetrafluoroethylene-lined reactor, and HCl solution was added to dissolve the raw materials, and then heated at 180°C for 12 hours, and then cooled to room temperature. The obtained crystals were washed with anhydrous ethanol and then dried at 60°C for 8 hours to obtain the K 0.95 Cl:0.05Sb 3+ Luminous materials.

[0052] The luminescent material K prepared in this embodiment 0.95 Cl:0.05Sb 3+ The XRD pattern of Figure 1 , emission spectrum see Figure 3 .

[0053] Depend on Figure 1 It can be seen that the X-ray diffraction peak of the luminescent material of this embodiment is consistent with that of the standard card, and no other impurities are observed.

[0054] Depend on Figure 3 It can be seen that the emission peak of the luminescent material of this embodiment is located near 590 nm, and the luminescent intensity at the highest peak of the emission peak is about 1830 counts.

[0055] Example 5

[0056] Preparation of Antimony Ion Doped Potassium Chloride Luminescent Material

[0057] The chemical formula of the antimony ion-doped potassium chloride luminescent material prepared in this embodiment is: K 0.93 Cl:0.07Sb 3+ , the preparation method is as follows:

[0058] The raw materials potassium chloride and antimony oxide were weighed in a molar ratio of 0.93:0.07, and put into a polytetrafluoroethylene-lined reactor. HCl solution was added to dissolve the raw materials, and then heated at 180°C for 12 hours, and then cooled to room temperature. The obtained crystals were washed with anhydrous ethanol and then dried at 60°C for 8 hours to obtain K 0.93 Cl:0.07Sb3+ Luminous materials.

[0059] The luminescent material K prepared in this embodiment 0.93 Cl:0.07Sb 3+ The XRD pattern of Figure 1 , emission spectrum see Figure 3 .

[0060] Depend on Figure 1 It can be seen that the X-ray diffraction peak of the luminescent material of this embodiment is consistent with that of the standard card, and no other impurities are observed.

[0061] Depend on Figure 3 It can be seen that the emission peak of the luminescent material of this embodiment is located near 590 nm, and the luminescent intensity at the highest peak of the emission peak is about 2075 counts.

[0062] Example 6

[0063] Preparation of Antimony Ion Doped Potassium Chloride Luminescent Material

[0064] The chemical formula of the antimony ion-doped potassium chloride luminescent material prepared in this embodiment is: K 0.90 Cl:0.10Sb 3+ , the preparation method is as follows:

[0065] The raw materials potassium chloride and antimony oxide were weighed in a molar ratio of 0.90:0.10, put into a polytetrafluoroethylene-lined reactor, and HCl solution was added to dissolve the raw materials. Then, the raw materials were heated at 180°C for 12 hours and cooled to room temperature. The obtained crystals were washed with anhydrous ethanol and then dried at 60°C to obtain K 0.90 Cl:0.10Sb 3+ Luminous materials.

[0066] The luminescent material K prepared in this embodiment 0.90 Cl:0.10Sb 3+ The XRD pattern of Figure 1 , emission spectrum see Figure 3 .

[0067] Depend on Figure 1 It can be seen that the X-ray diffraction peak of the luminescent material of this embodiment is consistent with that of the standard card, and no other impurities are observed.

[0068] Depend on Figure 3 It can be seen that the emission peak of the luminescent material of this embodiment is located near 590 nm, and the luminescent intensity at the highest peak of the emission peak is about 2371 counts.

[0069] Example 7

[0070] Preparation of Antimony Ion Doped Potassium Chloride Luminescent Material

[0071] The chemical formula of the antimony ion-doped potassium chloride luminescent material prepared in this embodiment is: K 0.80 Cl:0.20Sb 3+ , the preparation method is as follows:

[0072] The raw materials potassium chloride and antimony oxide were weighed in a molar ratio of 0.80:0.20, put into a polytetrafluoroethylene-lined reactor, and HCl solution was added to dissolve the raw materials. Then, the raw materials were heated at 180°C for 12 hours and cooled to room temperature. The obtained crystals were washed with anhydrous ethanol and then dried at 60°C to obtain K 0.80 Cl:0.20Sb 3+ Luminous materials.

[0073] The luminescent material K prepared in this embodiment 0.80 Cl:0.20Sb 3+ The XRD pattern of Figure 1 , emission spectrum see Figure 3 .

[0074] Depend on Figure 1 It can be seen that the X-ray diffraction peak of the luminescent material of this embodiment is consistent with that of the standard card, and no other impurities are observed.

[0075] Depend on Figure 3 It can be seen that the emission peak of the luminescent material of this embodiment is located near 590 nm, and the luminescent intensity at the highest peak of the emission peak is about 3088 counts.

[0076] Example 8

[0077] Preparation of Antimony Ion Doped Potassium Chloride Luminescent Material

[0078] The chemical formula of the antimony ion-doped potassium chloride luminescent material prepared in this embodiment is: K 0.70 Cl:0.30Sb 3+ , the preparation method is as follows:

[0079] The raw materials potassium chloride and antimony oxide were weighed in a molar ratio of 0.70:0.30, put into a polytetrafluoroethylene-lined reactor, and HCl solution was added to dissolve the raw materials. Then, the raw materials were heated at 180°C for 12 hours and cooled to room temperature. The obtained crystals were washed with anhydrous ethanol and then dried at 60°C to obtain K 0.70 Cl:0.30Sb 3+ Luminous materials.

[0080] The luminescent material K prepared in this embodiment 0.70 Cl:0.30Sb 3+ The XRD pattern of Figure 1 , emission spectrum see Figure 3 .

[0081] Depend on Figure 1 It can be seen that the X-ray diffraction peak of the luminescent material of this embodiment is consistent with that of the standard card, and no other impurities are observed.

[0082] Depend on Figure 3 It can be seen that the emission peak of the luminescent material of this embodiment is located near 590 nm, and the luminescent intensity at the highest peak of the emission peak is about 1571 counts.

[0083] Example 9

[0084] Preparation of Antimony Ion Doped Potassium Chloride Luminescent Material

[0085] The chemical formula of the antimony ion-doped potassium chloride luminescent material prepared in this embodiment is: K 0.60 Cl:0.40Sb 3+ , the preparation method is as follows:

[0086] The raw materials potassium chloride and antimony oxide were weighed in a molar ratio of 0.60:0.40, put into a polytetrafluoroethylene-lined reactor, and HCl solution was added to dissolve the raw materials. Then, the raw materials were heated at 180°C for 12 hours and cooled to room temperature. The obtained crystals were washed with anhydrous ethanol and then dried at 60°C to obtain K 0.60 Cl:0.40Sb 3+ Luminous materials.

[0087] The luminescent material K prepared in this embodiment 0.60 Cl:0.40Sb 3+ The XRD pattern of Figure 1 , emission spectrum see Figure 3 .

[0088] Depend on Figure 1 It can be seen that the X-ray diffraction peak of the luminescent material of this embodiment is consistent with that of the standard card, and no other impurities are observed.

[0089] Depend on Figure 3 It can be seen that the emission peak of the luminescent material of this embodiment is located near 590 nm, and the luminescent intensity at the highest peak of the emission peak is about 1297 counts.

[0090] Comparative Example 1

[0091] Preparation of potassium chloride materials

[0092] The preparation method is as follows:

[0093] Take the raw material potassium chloride, put it into a polytetrafluoroethylene-lined reactor, add HCl solution to dissolve the raw material, then heat it at 180°C for 12 hours, and then cool it to room temperature. The obtained crystals are washed with anhydrous ethanol and then dried at 60°C to obtain KCl material.

[0094] The XRD pattern of the KCl material prepared in this comparative example is shown in Figure 1 , emission spectrum see Figure 3 .

[0095] Depend on Figure 1 It can be seen that the X-ray diffraction peak of the KCl material is consistent with the standard card, and no other impurities are observed.

[0096] Depend on Figure 3 It can be seen that the KCl material does not produce photoluminescence phenomenon. All relative intensity data are multiplied by 10 to obtain the curve in the figure.

[0097] Structural performance analysis of luminescent materials:

[0098] Figure 1 The following are X-ray diffraction patterns of the materials obtained in Examples 1 to 9 and Comparative Example 1. Figure 1 It can be seen that antimony ions doped with potassium chloride luminescent material K (1-x) Cl:x Sb 3+ The XRD pattern of the nominal concentration (x=0.005-0.4) is consistent with the standard card of KCl (PDF#00-004-0587), indicating that the product with the component of KCl can be obtained by the method adopted in each embodiment of the present invention.

[0099] Figure 2 and Figure 3 The excitation spectra and emission spectra of the materials obtained in Examples 1 to 9 and Comparative Example 1 are shown in the figure. As can be seen from the figure, the excitation peak of the sample is located near 366nm, and the emission peak is located near 590nm, indicating that the luminescent material can be excited by ultraviolet light to achieve photoluminescence and emit orange-yellow light. 3+ As the ion doping concentration increases, the luminescence brightness of the luminescent material increases first and then decreases. 3+ The luminescence brightness is strongest when the ion doping amount is x = 0.20. 3+ When the ion doping amount is x = 0.40, the relative intensity of the emission spectrum is observed to be Sb 3+ The ion doping amount is 42% when x=0.20, which is presumably due to concentration quenching caused by excessive antimony concentration.

[0100] Figure 4 and Figure 5 The changes in the excitation spectrum and emission spectrum of the luminescent material prepared in Example 7 at different temperatures. As the temperature increases from 273K to 373K, the luminescence intensity of the luminescent material decreases rapidly, indicating that the luminescent material is extremely sensitive to temperature, which shows the application potential of the luminescent material in optical temperature measuring devices, especially in the field of achieving high-sensitivity ambient temperature measurement.

[0101] Figure 6 The graph of the integrated intensity of the emission spectrum of the luminescent material prepared in Example 7 of the present invention as a function of temperature in the range of 273K to 373K and the fitted function, where the points are experimental measurement values ​​and the curves are fitted function values. It can be seen that the integrated intensity of the luminescent material decreases as the temperature increases, and the integrated intensity of the emission spectrum (Ω) is a function of temperature (T): Ω = 68.21 - 0.58T + 0.001T 2 -1.5e -6 T 3 e is the natural constant Euler number. Therefore, the antimony ion doped potassium chloride luminescent material provided by the present invention can realize the ambient temperature measurement according to the change of the integral intensity of the emission spectrum with the temperature.

[0102] Figure 7 The luminescent material prepared in Example 7 of the present invention is given by the formula (S R : relative sensitivity, Ω: luminescence integrated intensity, T: temperature) to obtain the temperature measurement sensitivity curve. From the performance test results, it can be seen that the core performance temperature measurement sensitivity of the material is very high, among which the sensitivity reaches 3.2% K at 293K -1 It can be seen that the material prepared by the present invention has good temperature measurement sensitivity, especially under the ambient temperature condition of 293K. Moreover, in the temperature range of 273-323K, the temperature measurement sensitivity of the material always remains in a high sensitivity range, which is an optical ambient temperature measurement material with great potential.

[0103] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An antimony ion-doped potassium chloride luminescent material, characterized in that: Its chemical formula is K (1-x) Cl:xSb 3+ , where x=0.005~0.

4.

2. Use of the antimony ion-doped potassium chloride luminescent material as claimed in claim 1 in the preparation of an optical ambient thermometer.

3. The use of the antimony ion-doped potassium chloride luminescent material as claimed in claim 2 in the preparation of an optical ambient thermometer, characterized in that: The reference of the application is: when the luminescent material is excited by ultraviolet light of 366nm, the integrated intensity Ω of the emission spectrum is a function of the temperature T Ω=68.21-0.58T+0.001T 2 -1.5e -6 T 3 change.

4. The method for preparing the antimony ion-doped potassium chloride luminescent material according to claim 1, characterized in that: The following steps are involved: A potassium-containing compound, a chlorine-containing compound and an antimony-containing compound are mixed, and then synthesized by a hydrothermal method to obtain the antimony ion-doped potassium chloride luminescent material.

5. The method for preparing the antimony ion-doped potassium chloride luminescent material according to claim 4, characterized in that: The potassium-containing compound is any one of potassium chloride, oxide, peroxide, superoxide, hydroxide, nitrate, carbonate, sulfate and the like, or a mixture of two or more of them in any proportion.

6. The method for preparing the antimony ion-doped potassium chloride luminescent material according to claim 4, characterized in that: The chlorine-containing compound is any one of various chlorates, hypochlorites, chlorides and other compounds of chlorine, or a mixture of two or more of them in any proportion.

7. The method for preparing the antimony ion-doped potassium chloride luminescent material according to claim 4, characterized in that: The antimony-containing compound is any one of antimony oxides, sulfides, halides, hydrides and other compounds, or a mixture of two or more of them in any proportion.

8. The method for preparing the antimony ion-doped potassium chloride luminescent material according to any one of claims 4 to 7, characterized in that: The specific preparation process is as follows: according to the chemical formula K (1-x) Cl:x Sb 3+ The raw materials of potassium-containing compound, chlorine-containing compound and antimony-containing compound are weighed and placed in a polytetrafluoroethylene-lined reactor, HCl solution is added to dissolve the raw materials, and then heated at 150-200° C. for 10-14 hours, and then cooled to room temperature. The obtained crystals are washed with anhydrous ethanol and then dried at 60° C. for 5-10 hours to obtain the antimony ion-doped potassium chloride luminescent material.

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